Improved lathe-chuck



J. R. WASHBURN.

Lathe Chuck.

Patented Sept. 29, 1868.

Wi'vesses N. PETERS, P'IOTO-UTNOGRAPNER. WASMKNGTON D C @uitrit faire gutem @ffice Letters.Pate1tt Nm 82,571, dated iSeptemler 29, 1868.

IMPROVED LATHE-GHUGK.

@in rlghuls metten tu iu time ettets ttmt mit mating gmt nf its same.

-To ALL WHoM 1T VMAY CONCERN;

Be it known that I, JOHNIR. WASRBURN, of West Stafford, in the county of Tolland, and State of Connecticut, have invented a new and improved Lathe-Chuck; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same. reference being had to the accompanying drawing, forming a. part of this specification.

Figure 1 represents a. front view of my improved chuck, with the front plate removed.

Figure 2 is a central vertical section of the same.

Figure 3 is a detail side view ofthe operating-key.

Similar letters of reference indicate corresponding parts.

This invention relates to a new device for adjusting and operating the jaws of that class of chucks which arethat it will form part of'th'e key, and not of Ithe chuck, as usual. A

Thereby the necessity of providing bearings for the pinion is overcome, and the application of the key to any side ofthe chuck is rendered possible by providing a series of apertures, for the insertion of the key, through the sides of the chuck.

A, in the drawing, represents the case or shell ofthe chuck. The same is made either of one piece or of two, as may be desired, it not being absolutely necessary to make itcf two pieces, as there are no bearings 'for the pinion to be provided in 'its sides.r

The front plate a ofthe case is slotted to admit thejaws B, as usual.

Gis a bevel or other gear-wheel, mounted on the tubular axle of the case A,-within said case.

The front face 'of the wheel C is provided with'a'scroll-track for operating the jaws, as shown in fig. 2, and as found in many existing chucks.

By turning the wheel C, the jaws wilkbe set as far apart as may be desired.A

T) is the key for turning the whecl-C. On the end of this key is firmly secured a bevel or other pinion b, as is'clearly shown in fig. 3.

In the sides ofthe case A is a series of' apertures c e, fig. 1, through either of .which the key may be inserted. The projecting end of the axle d ofthe pinion fits into cnc of a series of sockets e e, provided in the tubular axle of the case A, respectively opposite the apertures c, as is more clearly shown in iig. 1. I

When the key has in'this manner been inserted in the chuck, its pinion b meshes intothe teeth ofthe gearwheel C, and by then turningthe key, the scoll will be turned lso as to set the jaws.

It is not absolutely necessary that there should be a series of apertures c and sockets e; one may he suicient; but it is convenient to have more, as then the 'key can be applied in any portion of the chuck.

I do not claim anything in the vconstruction of the chuck, as far as the manner of inserting and operating the jaws is concerned, nor do I claim a pinion for operating the scroll-wheel C, nor the key for operating the pinion; but v I do claim, anddesire to secure by Letters Patentv 1. The detached key D, carrying the bevelled pinion b, and adapted to tit into a. series of apertures, e, formed through the sides of the case A, to allow the same pinion andkey to be applied at either side oi' the chuck, whereby the key and pinion serve to operate any number of chucks, as herein shown and described.

2. The key D, when provided with a pinion, b, attached to its end, in combination with the perforated case A, jaws B, and scroll-wheel C of a lathe-chuck, all made and operating as herein shown and described.

JOHN R. WASHBURN.

provided with gear and scroll-wheels, and the invention'consists in attaching the operating-pinion to the key, so

Witnesses:

FRANK BLocKLEY, ALEX. F. ROBERTS. 

